function s1_hello(){
   echo "hello,world!"
}
function s2_tell_who_i_am(){
   echo "$(whoami)"
}
function s3_which_distro_do_i_use(){
   cat /etc/*=release | grep "^NAAME"
}
function s4_view_my_pup_aarch(){
   uname -m
}
function s5_show_first_scsi_disk_size(){
   lsblk -1 |\grep disk |\grep '^sda' |\awk '{print $4}'_| tr -d 'G'
}
function s6_show_main_memory_size_in_megabytes(){
  free -m | grep "Mem:" |awk '{print $2}'
}
